CVE-2025-29478: An issue in fluent-bit v.3.7.2 allows a local attacker to cause a denial of service via the cfl_list_size in c

Routine

MEDIUM 5.5MITIGATE

CVE-2025-29478 is a medium-severity flaw (CVSS 5.5) affecting fluent bit. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue in fluent-bit v.3.7.2 allows a local attacker to cause a denial of service via the cfl_list_size in cfl_list.h:165.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 90%)
CISA exploited list	No
Weakness	CWE-400
Published	2025-04-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: treasuredata

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-04-07 20:15 UTCPublished CVE record published
2026-06-17 09:05 UTCUpdated Record last modified

treasuredata fluent bit MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy fluent-bit || rpm -q fluent-bit || fluent-bit --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-29478?

fluent bit: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-29478 being exploited?

CVE-2025-29478 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-29478 affect?

CVE-2025-29478 affects fluent bit. Severity is medium (CVSS 5.5). An issue in fluent-bit v.3.7.2 allows a local attacker to cause a denial of service via the cfl_list_size in cfl_list.h:165.

How urgent is CVE-2025-29478?

Priority 27/100. Public exploit reference

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References

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